C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 51/42 (2006.01) B01D 33/06 (2006.01) B01J 31/40 (2006.01)
Patent
CA 2570969
A process is disclosed that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic. More particularly, the process involves recovery of a metal catalyst from an oxidizer purge stream through the use of a pressure filter, the combining of water with a mother liquor to recover the metal catalyst and then subjecting an aqueous mixture so formed to a single stage extraction with an extraction solvent to produce an extract stream comprising organic impurities and a raffinate stream comprising the metal catalyst.
Procédé qui concerne la récupération d~un catalyseur métallique d~un flux de purge d~un agent oxydant généré dans la synthèse d~un acide carboxylique, typiquement téréphtalique. Plus particulièrement, le procédé implique les étapes consistant à récupérer un catalyseur métallique à partir d~un flux de purge d~un agent oxydant par l~utilisation d~un filtre-presse, à combiner de l~eau avec une solution mère pour récupérer le catalyseur métallique, et ensuite à soumettre un mélange aqueux ainsi formé à une extraction à simple étage avec un solvant d~extraction pour produire un flux d~extrait comprenant des impuretés organiques et un flux de raffinat comprenant le catalyseur métallique.
Lin Robert
Parker Kenny Randolph
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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